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QSSC-S4R Technical Product Specification HSC IPMB Application and Sensors

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32. HSC IPMB Application and Sensors

This section presents the additional specifications required for the HSC’s implementation as an IPMI controller. See the

Intelligent Platform Management Interface Specification for more information.

32.1 LUNs

The HSC accepts Intelligent Platform Management Bus requests directed to its LUN 00. There are no restrictions on

the LUNs that the HSC uses when sending requests or responses to other controllers.

32.2 Sensors

The HSC implements the same basic sensor model that is utilized by the other management controllers in the system.

Sensor model information is in the Intelligent Platform Management Interface Specification. A common set of IPMI

commands configures the sensors and returns the threshold status. The following table specifies the sensor numbers

and thresholds for the sensors implemented by the HSC.

Sensor initialization is handled as follows: The BMC implements the internal sensor initialization agent functionality

specified in the Intelligent Platform Management Interface Specification. When the BMC initializes, it walks the sensor

data records and configures the IPMB devices that have the Init required bit set in their SDRs. This includes setting

sensor thresholds, enabling/disabling sensor event message scanning, and enabling/disabling sensor event messages,

as indicated.

Table 208. HSC Sensor / Event Message Source Numbers

Sensor Name Sensor

Sensor Type

(Hex)

Event /

Reading

Type

Code

Event

Data

Re-arm Event / Threshold Trigger

Backplane

Temperature

01h Temp. (01h) 01h Reading

thresh.

Value

auto Assertion or deassertion of

transition to uc, unc, lnc, lc

Drive Slot 0 Status 02h Drive Slot

(0Dh)